What about seating if I don't get there early?

This will be my first Rocky Grass.

May not make it there until mid afternoon on Friday.

After reading about getting there early to get a tarp spot, now I’m worried…will we be destined to sit next to the port-a-potties or will there still be “decent” areas to sit at that point?

Don’t really mind the sun, and would prefer to sit near the river. Will also have a 7 year old with us, so wouldn’t mind being near other families.

Can someone fill me in?